Gastrointestinal Surgery Practice Questions

Q: Which of the following is considered a precancerous condition of gastric adenocarcinoma?

Chronic gastric atrophy. **Explanation:** Gastric adenocarcinoma typically develops through a well-defined sequence of histological changes known as **Correa’s Cascade**. This progression starts from normal mucosa to chronic gastritis, followed by **chronic gastric atrophy**, intestinal metaplasia, dysplasia, and finally, invasive carcinoma. **Why Chronic Gastric Atrophy is correct:** Chronic gastric atrophy (often due to *H. pylori* infection or autoimmune gastritis) involves the loss of glandular epithelium. This leads to **hypochlorhydria**, which allows for the overgrowth of nitrate-reducing bacteria. These bacteria convert dietary nitrates into carcinogenic N-nitroso compounds, significantly increasing the risk of malignant transformation. **Analysis of Incorrect Options:** * **A. Peptic Ulcer:** While gastric ulcers must be biopsied to rule out malignancy, a benign peptic ulcer itself does not transform into cancer. * **C. Achalasia Cardia:** This is a precancerous condition for **Squamous Cell Carcinoma of the Esophagus**, not gastric adenocarcinoma, due to chronic stasis and esophagitis. * **D. Curling’s Ulcer:** These are acute stress ulcers occurring in the fundus and corpus of the stomach following severe **burns**. They are transient and do not have malignant potential. **High-Yield Clinical Pearls for NEET-PG:** * **Intestinal Metaplasia:** The presence of goblet cells in the gastric mucosa is the strongest histological predictor of gastric cancer risk. * **Blood Group A:** Associated with an increased risk of gastric cancer. * **Lauren Classification:** Divides gastric cancer into **Intestinal** (associated with environmental factors/atrophy) and **Diffuse** (associated with CDH1 mutation/Signet ring cells). * **Sister Mary Joseph Nodule:** Umbilical metastasis from gastric cancer.

Q: Which of the following is true about Boerhaave's syndrome?

It presents with acute chest pain.. **Explanation:** **Boerhaave’s Syndrome** is a spontaneous, full-thickness longitudinal transmural rupture of the esophagus, typically occurring due to a sudden increase in intra-abdominal pressure against a closed glottis (e.g., forceful vomiting or retching). 1. **Why Option C is Correct:** The hallmark of Boerhaave’s syndrome is the **Mackler’s Triad**: vomiting, followed by excruciating **acute chest pain** (often mimicking a myocardial infarction), and subcutaneous emphysema. The pain results from the sudden rupture and subsequent chemical mediastinitis caused by the leakage of gastric contents into the mediastinal space. 2. **Why Other Options are Incorrect:** * **Option A:** Boerhaave’s is **spontaneous** (barogenic). In contrast, iatrogenic injury (e.g., during endoscopy) is the most common cause of esophageal perforation overall, but it is not called Boerhaave’s. * **Option B:** It is never silent; it is a surgical emergency characterized by rapid clinical deterioration, sepsis, and shock. * **Option D:** Treatment is rarely conservative. It usually requires **emergency surgical intervention** (primary repair and mediastinal drainage) within 24 hours to prevent high mortality. Conservative management is reserved only for very small, contained leaks in stable patients. **High-Yield Clinical Pearls for NEET-PG:** * **Most Common Site:** Left posterolateral aspect of the distal esophagus (2–3 cm above the gastroesophageal junction). * **Diagnosis:** Chest X-ray may show pneumomediastinum or "V sign of Naclerio." The gold standard for diagnosis is a **Gastrografin (water-soluble) swallow study**. * **Differential:** Must be distinguished from **Mallory-Weiss Tear**, which is a non-transmural mucosal tear presenting with hematemesis, whereas Boerhaave’s rarely presents with significant bleeding.

Q: What is the most common presentation of Peutz-Jeghers syndrome?

Intussusception. **Explanation:** **Peutz-Jeghers Syndrome (PJS)** is an autosomal dominant condition characterized by the mutation of the **STK11 (LKB1)** gene on chromosome 19. It is defined by the presence of multiple hamartomatous polyps throughout the gastrointestinal tract and mucocutaneous hyperpigmentation. **Why Intussusception is the correct answer:** The hamartomatous polyps in PJS are typically large and pedunculated. These polyps act as a **lead point**, causing the bowel to telescope into itself. **Intussusception** is the most common clinical presentation and complication, occurring in nearly 50% of patients by age 20. It most frequently involves the small intestine and often presents as recurrent, self-limiting bouts of abdominal pain or acute intestinal obstruction. **Analysis of Incorrect Options:** * **Pancreatic cancer:** While PJS patients have a significantly increased lifetime risk of pancreatic cancer (up to 36%), it is a late-stage complication, not the most common initial presentation. * **Melanoma:** Patients have a slightly increased risk of various cancers, but melanoma is not a hallmark presentation. The characteristic "spots" are benign melanin deposits (lentigines), not malignant melanoma. * **Malabsorption:** Although polyps are numerous, they are hamartomatous and do not typically interfere with the mucosal surface area enough to cause clinical malabsorption. **High-Yield Clinical Pearls for NEET-PG:** * **Triad:** Mucocutaneous pigmentation (lips/buccal mucosa), hamartomatous polyps, and increased cancer risk. * **Histology:** The hallmark is a **"Christmas tree" appearance** (branching smooth muscle fibers within the lamina propria). * **Cancer Risks:** Highest risks are for Colorectal, Breast, and Pancreatic cancers. * **Sertoli Cell Tumors:** PJS is associated with Large Cell Calcifying Sertoli Cell Tumors (LCCSCT) of the testes, leading to precocious puberty.

Q: When acute appendicitis is suspected, how can it be confirmed?

All of the above. Acute appendicitis is primarily a **clinical diagnosis**, but modern surgical practice relies on a combination of physical findings and diagnostic imaging to confirm the diagnosis and reduce the rate of negative appendectomies. **Explanation of Options:** * **Clinical Examination (A):** This remains the cornerstone of diagnosis. Classic signs like migratory pain to the Right Iliac Fossa (RIF), tenderness at McBurney’s point, and signs of peritoneal irritation (Rovsing’s, Psoas, and Obturator signs) are highly suggestive. Scoring systems like the **Alvarado Score** are used to quantify clinical suspicion. * **Ultrasound (USG) (B):** This is the preferred **initial imaging modality**, especially in children and pregnant women, to avoid radiation. A non-compressible, aperistaltic appendix with a diameter >6 mm is diagnostic. * **CT Scan (C):** Contrast-enhanced CT (CECT) is the **most sensitive and specific** imaging modality (Gold Standard). It is particularly useful in elderly patients or when the clinical presentation is atypical, helping to rule out differentials like diverticulitis or malignancy. **Why "All of the Above" is Correct:** While the diagnosis starts with a clinical suspicion, confirmation often requires imaging to visualize the inflamed appendix and assess for complications like phlegmon or abscess. Therefore, all three methods are integral parts of the diagnostic workup. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** CECT abdomen. * **Initial Investigation of Choice:** USG abdomen. * **Most Common Position of Appendix:** Retrocecal (74%). * **Alvarado Score:** A score of **≥7** is strongly predictive of appendicitis. * **Murphy’s Triad:** Pain, followed by vomiting, followed by fever (classic sequence in appendicitis).

Q: A 24-year-old man presents in septic shock from an empyema. He is febrile to 103 ounit0000B0F, tachycardic in the 120s, and hypotensive to the 90s. His oxygen saturation is 98% on 2-L oxygen. His white blood cell count is 25,000/mL and creatinine is 0.8 mg/dL. His blood pressure does not respond to fluid administration despite a CVP of 15. Which of the following therapies is indicated in managing this patient?

Norepinephrine. ### Explanation **Correct Answer: D. Norepinephrine** This patient is in **septic shock**, defined by persistent hypotension requiring vasopressors to maintain a Mean Arterial Pressure (MAP) ≥ 65 mmHg and a serum lactate level > 2 mmol/L despite adequate fluid resuscitation. The patient has received fluid boluses (CVP is 15 cmH₂O, indicating adequate preload), yet remains hypotensive. According to the **Surviving Sepsis Campaign guidelines**, **Norepinephrine** is the first-line vasopressor of choice. It acts primarily as an $\alpha$-1 agonist (causing vasoconstriction) with modest $\beta$-1 effects (increasing stroke volume), making it highly effective at increasing MAP with a lower risk of tachyarrhythmias compared to dopamine. **Why other options are incorrect:** * **A. Intubation:** The patient’s oxygen saturation is 98% on minimal support (2L $O_2$). While intubation may be needed later if he develops ARDS or altered mental status, it is not the immediate priority for hemodynamic stabilization. * **B. Recombinant human activated protein C (Drotrecogin alfa):** This was previously used for severe sepsis but was withdrawn from the global market after the PROWESS-SHOCK trial failed to show a mortality benefit. * **C. Epinephrine:** This is generally considered a second-line agent (added to or substituted for norepinephrine) when an additional agent is needed to maintain adequate blood pressure. **NEET-PG Clinical Pearls:** * **Fluid Resuscitation:** The initial target is 30 mL/kg of crystalloid within the first 3 hours. * **Vasopressor of Choice:** Norepinephrine is #1 for Septic, Cardiogenic, and Neurogenic shock. * **Target MAP:** $\geq$ 65 mmHg. * **Inotrope of Choice:** If there is evidence of myocardial dysfunction (low cardiac output) despite adequate MAP, **Dobutamine** is the preferred add-on.

Q: What are the causes of esophageal carcinoma?

Tylosis. **Explanation:** Esophageal carcinoma is broadly categorized into **Squamous Cell Carcinoma (SCC)** and **Adenocarcinoma**, each having distinct risk factors. **1. Why Tylosis is Correct:** Tylosis (specifically **Howel-Evans syndrome**) is an autosomal dominant condition characterized by hyperkeratosis of the palms and soles. It is the strongest genetic risk factor for **Squamous Cell Carcinoma** of the esophagus, with a lifetime risk approaching **90%**. It involves a mutation in the *RHBDF2* gene. **2. Analysis of Incorrect Options:** * **Reflux Esophagitis:** While Chronic Gastroesophageal Reflux Disease (GERD) leads to Barrett’s Esophagus (a precursor to Adenocarcinoma), "Reflux Esophagitis" itself is an inflammatory state. While related, Tylosis is a more direct genetic "cause" often tested in this specific MCQ context. * **Lye Ingestion:** Corrosive (alkali) injury increases the risk of SCC (usually 20–40 years after ingestion). However, in the context of this specific question, Tylosis is the classic "textbook" association. * **Perforation:** This is an acute surgical emergency (e.g., Boerhaave syndrome or iatrogenic) and does not cause malignancy. **High-Yield Clinical Pearls for NEET-PG:** * **SCC Risk Factors:** Smoking, Alcohol, Achalasia Cardia, Plummer-Vinson Syndrome, Lye strictures, and Dietary deficiencies (Zinc/Vitamin A). * **Adenocarcinoma Risk Factors:** Obesity, GERD, and **Barrett’s Esophagus** (metaplasia of stratified squamous to columnar epithelium). * **Location:** SCC is most common in the **middle third**; Adenocarcinoma is most common in the **lower third**. * **Investigation of Choice:** Upper GI Endoscopy + Biopsy.

Question 1

Which of the following is considered a precancerous condition of gastric adenocarcinoma?

Accepted Answer

Chronic gastric atrophy

Answer

Peptic ulcer

Answer

Achalasia cardia

Answer

Curling's ulcer

Question 2

Intussusception is frequently associated with which of the following?

Accepted Answer

Submucosal lipoma

Answer

Subserosal lipoma

Answer

Intramural lipoma

Answer

Subfascial lipoma

Question 3

Which of the following is true about Boerhaave's syndrome?

Accepted Answer

It presents with acute chest pain.

Answer

It is iatrogenic.

Answer

It is a silent manifestation.

Answer

Treatment is conservative.

Question 4

The Minnesota tube, used for the control of variceal bleeding in portal hypertension, has how many lumens?

Accepted Answer

Four lumens

Answer

One lumen

Answer

Two lumens

Answer

Three lumens

Question 5

A 16-year-old boy presents with a 24-hour history of severe abdominal pain, nausea, vomiting, and low-grade fever. The pain is initially periumbilical in location but has migrated to the right lower quadrant of the abdomen, with maximal tenderness elicited at McBurney point. The leukocyte count is 14,000/mm3, with 74% segmented neutrophils and 12% bands. Surgery is performed. Which of the following describes the expected findings at the affected site?

Accepted Answer

Prominent areas of edema, congestion, and a purulent reaction with localized areas of abscess formation

Answer

Fistula connecting to the abdominal wall

Answer

Granulomatous inflammation with prominent aggregates of epithelioid cells and multinucleated giant cells

Answer

Massive infiltration of lymphocytes and plasma cells

Question 6

What is the most common presentation of Peutz-Jeghers syndrome?

Accepted Answer

Intussusception

Answer

Pancreatic cancer

Answer

Melanoma

Answer

Malabsorption

Question 7

When acute appendicitis is suspected, how can it be confirmed?

Accepted Answer

All of the above

Answer

Clinical examination

Answer

Ultrasound (USG)

Answer

CT scan

Question 8

A 24-year-old man presents in septic shock from an empyema. He is febrile to 103
ounit0000B0F, tachycardic in the 120s, and hypotensive to the 90s. His oxygen saturation is 98% on 2-L oxygen. His white blood cell count is 25,000/mL and creatinine is 0.8 mg/dL. His blood pressure does not respond to fluid administration despite a CVP of 15. Which of the following therapies is indicated in managing this patient?

Accepted Answer

Norepinephrine

Answer

Intubation

Answer

Recombinant human activated protein C

Answer

Epinephrine

Question 9

Regarding adhesive intestinal obstruction, which of the following statements is TRUE?

Accepted Answer

Avoid surgery for the initial 48-72 hours

Answer

Never operate

Answer

Operate after a minimum of 10 days of conservative treatment

Answer

Immediate operation

Question 10

What are the causes of esophageal carcinoma?

Accepted Answer

Tylosis

Answer

Reflux esophagitis

Answer

Lye ingestion

Answer

Perforation

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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